Warp-evening mechanism for looms.



' PATENTED DEC. 15, 1903;

E.- S. WOOD. WARP EVENING MECHANISM FOR LOOMS.

APPLICATION FILED JUNE 22. 1903.

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N0 MODEL.

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No. 747,310. PATENTED DEC. 15, 1903.

E. s. WOOD. r WARP EVENING MECHANISM FOR LOOMS.

I APPLICATION FILED JUNE 22. 1903. .H0 MODEL. 7 I SHEETS-SHEET 2.

UNITED STATES i atented December 15, 1903. PATENT OFFICE.

EVERETT S. WOOD, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY,OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP-EVENING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 747,310, dated December15, 1903.

Application filed June 22, 1903.

To all whom it may concern.- I

Be it known that I, EVERETT S. W001), a

citizen of the United States, and a resident of out No. 732,885, datedJuly 3, 1903-it is possible for the detector-heddles to jump higherthanis necessary as they rise with the upward movement oftheharness-frame to movethe warps controlled thereby into the upperplane of the shed. As a matter of fact it is usual for such jumping tooccur, and it is due to the fact that the longitudinal slots in theheddles are longer than the cross-bar of the frame extendedtherethrough, and this bar consequentlycannot preventthejumping,for, asis well known to those skilled in the art, the lower edge of thecross-bar is well above the bottoms of the heddle-slots when theharness-frame has reached its highest point. There are two objections inpractice which result from this jumping of the heddles: First, it bringsextra and entirely unnecessary and undesirable strain on the warps,causing them to rise above the upper plane of the shed second, when theseparator shown in the patent referred to is employed it sometimeshappens' that the warps in the upper plane of the shed are carried up bythe j umping heddles between or against separators cooperating with theheddles controlling the warps in the lower plane of the shed. This oftenstrains, frays, or cuts the warps in the upper plane,causing unnecessarywarp breakage. In explanation of this action it may be stated that whena harness-frame descends the resistance of the warps acts upon thebeddles in such a manner that they and the separators are pressed orcrowded together at their upper ends. When the other harness-frameSerial No. 162,468. (No modelJ ascends, the jumping of the heddlescarries the warps up high enough to pull or tend to pull some of thewarps between the crowded heddles of the frame which is down, andsuchwarps are caught or pinched and held up. Consequently when the nextchange of shed occurs the caught warps are pulled down by their ownheddles and lifted up by the pinching heddles or heddles'and'separatorsof the other frame, and if the warps cannot stand the strain necessaryto release them they break. In any event the warps are improperlystrained and rubbed or frayed, and the action described is one of theprincipal causes of warp breakage. V v

' In accordance with my present invention I provide a stop orguard-which is extended transversely above the warps adjacent theharness-frames and so located that it acts to limit the upward movementof the warps when raised to the upper plane of the shed and'preventsthem from being lifted above such plane by the jumping tendency of theheddles. As the warps are limited in their upward movement, it followsthat the jumping cannot occur, and consequently the warps cannot becaught or pinched, as hereinbefore mentioned, and warp breakage fromsuch cause is eliminated. I may alsoprovide the stop or guard withpin-like projections,which extend'longitudinallyof the warps and whichcooperate with the detector-heddles of one or more of the harness-framesof a set, acting as- 75 separators to preventlateral displacement of theheddles.

The novel features of my invention willbe fully described in thesubjoined specification,

and particularly pointed out in the following 3 the line 3 3, Fig. 1,also looking toward the right. Fig. 4 is a like View, but showing thewarp stop or guardprovided with means to separatev the he'ddles of oneof the harnessframes. Fig. is a perspective detail, enlarged, of a partof the stop or guard shown in Fig. 4; and Fig. 6 is an enlargedperspective view of one of the top separators shown in Figs. 1 to 3.

I have herein shown a plain or two-harness set, each harness-framecomprising two upright side bars b, connected at their lower ends by abottom cross-bar b and near their upper ends by two parallel supports orcrossbars a a, the frames being connected by links I) with a top motionT, Fig. 1, and forming no part of my invention, the bottom bars b beingconnected in any suitable manner with treadles. (Not shown.)

In Figs. 2, 3, and 4 the harness-frames are indicated as a whole by thereference-letters H and H, each being shown as provided with two banksor series of warp-stop-motion-controlling detectors d 01', respectively,which serve also also as heddles and made as thin flat metal strips orplates, each having a warp-eye 2 and a longitudinal slot near the upperend, all substantially as in the patent referred to, the bars a and abeing loosely extended through the slots 20 of the heddles. An uprighttransverse plate B is extended between the lower ends of the banks ofheddles carried by the harness-frames and connected by bracket-like armsB with the loom sides, (see Fig. 1,) two oppositely-moving feelersf f,mounted on a normally rocking shaft g cooperating with a releaseddetector-heddle to efiect stoppage of the loom automatically, all inwell-known manner.

In Figs. 1, 2, and 3 I have shown separators s for the detector-heddlesfor one bank of each harnessframe, said separators being mounted on thebars a a, respectively, and being shown as alternating with the heddles,one of the separators, which is 'made of thin fiat sheet metal, beingshown separately in Fig. 6, and having a slot 3 for the bar andoverturned longitudinal edges 8 all substantially as shown in the patentreferred to and operating as therein set forth. It is to be understood,however, that the particular arrangement of the separators may bechanged, and the shape thereof may be varied, so far as my presentinvention is concerned, without departing therefrom.

In Figs. land 2 front and back warp-rests w and w are shown extendedacross the loom in front of and behind the front and backharness-frames, respectively, below the warps and sustained by stands10, secured to arms B of the brackets 13'. In the present embodiment ofmy invention the two front stands 10 have upturned extensions 15 ofsuflicient length to project somewhat above the warps when in the upperplane of the shed, and to these extensions is secured a stop or guard,shown as a bar or rod M, extended across the warps and located betweenthe harnessframes. The extensions 15 are vertically slotted at 16 toreceive the bolts 18 by which the stop M is held in place, and by meansof such connection the stop may be adjusted vertically. Referring toFig. 3, in which the front harness-frame is raised, it will be seen thatthe stop M is just above the warps W in the upper plane of the shed,andit will be manifest that said stop acts to limit or prevent any furtherupward movement of any of said warps due to jumping of their heddles.The warps in the upper plane of the shed are thus evened, and theycannot be subjected to additional and unnecessary tension from jumpingheddles. Manifestly when the back frame H is raised to place the warps Win the upper plane of the shed the stop M will act thereupon as has beendescribed and will prevent them from being carried above such plane.Were it not for the stop, the jump of the heddles of eitherharness-frame would tend to lift their warps into contact with theseparators s of the other frame, as will be manifest from an inspectionof Fig. 3, such contact often operating to cut, fray, or otherwisestrain the warps caught and pinched between the heddles pressed orcrowded together in the manner described. I prefer to place the stopbetween the two frames, as thereby the most effective action appears tobe attained, though my invention is not restricted thereto.

Sometimes the stop may be provided'with projections, such as pins 'm(see Figs. 4 and 5,) extended in the direction of the length of thewarps and long enough to cooperate with the detector-handles of one ofthe harthem and prevent their lateral swaying displacement. In Fig. 4the stop M is I vided with suchpins, as m and the re shown as arrangedto act as separat -or the heddles of the back harness-fra beingunnecessary as a general thinghio use pins for each frame, and while notop separators are shown in said figure it is to be understood that theymay be used, if desired.

For the reasons stated in the patent referred to it will be preferable,probably in the majority of cases, to employ top separators, as is shownin Figs. 1, 2, and 3.

My invention is not restricted to the precise construction andarrangement herein shown and described, as the same may be modified orvaried without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a loom, reciprocating harness-frames each provided withdetector-heddles having limited longitudinal movement relative to theirframes, and a stationarystop extended transversely above the warpsadjacent the harness-frames, to stop jumping up of the detector-heddlesand limit upward movement of the warps raised to the upper plane of theshed.

2. In a loom, reciprocating harness-frames each provided with across-bar,longitudinallyslotted detector-heddles suspended from thecross-bars and having limited longitudinal movement relative thereto,and a stationary stop extended transversely above the warps in closeproximity to the harness-frames, to prevent jumping of the warps abovethe up per plane of the shed when raised thereto.

3. In a loom, reciprocating harness-frames each provided withdetector-he'ddles having limited longitudinal movement relative to theirframes, and a stationary stop extended transversely above the warpsbetween two ad'- jacent harness-frames, to prevent further upwardmovement of the detector-heddles which carry the warps when raised tothe upper plane ofthe shed.

4. In a loom, reciprocating harness-frames each provided 'withdetector-heddles having limited longitudinal movement relative to theirframes, a rod extended between two adjacent harness-frames above thewarps,to prevent lifting of the warps above the upper plane of the shedwhen raised thereto,and vertically-adjustable means-to support said rod.

5. In a loom, two oppositely-reciprocating harness-frames each providedwith a crossthe warp between the frames, to form a stopfor thewarp-threads raised to the upper plane of the shed and prevent them frombeing raised above such plane.

6. In a loom, two oppositely-reciprocating harness-frames eachprovidedwith a crossbar,a series oflongitudinally slotteddetectorheddles strung thereon and having limited longitudinal movementrelative thereto, .a transverse stop extended above the warps betweenthe frames,and separating-pins extended from the stop longitudinally ofthe warps, to extend between the heddles of one of the frames andprevent lateral displacement thereof.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EVERETT S. WOOD. Witnesses: 1

CLARE H. DRAPER, FRANK J. DUTCHER.

